Spreader



June 23, 1925. 1,543,315

J. BLAND SPREADER Filed May l9 1924 Int/ 32507" .foknjZcUaZ Patented June 23, 1925.

UNITED STATES JOHN (BLAND, or CHICAGO, ILLINOIS.

SPREADER.

Application filed May 19, 1924. Serial No. 714,203. i

To all whom it may concern:

Be it known that I, JOHN BLAND, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Spreaders, of which the following is a specification.

This invention relates to a spreader, and particularly to a spreader adapted for use in connection with screening and conveying mechanism, although it is not limited to this use. One object of the invention is to provide a device by means of which material which is beingconveyed may be spread evenly over a given surface. Another object is to provide means for spreading material across a surface at uniform thickness. Another object of my invention is to provide such a means which is adjustable so that it may be adjusted for different materials and so that it may be adjusted to compensate for variations in conditions where the same material is used, such for example as variations in humidity and temperature. Other objects will appear from time to time throughout the specification and claims.

My invention is illustrated more or less diagrammatically in the accompanying drawings, wherein:

Figure l is a side elevation-of a vibratory screen with my spreader installed;

Figure 2 is a vertical cross section'taken on line 2'2 of Figure 1 showing a section through the spreader, and showing also a section through the stream of material which is flowing upon the spreader;

Figure 8 is a section similar to Figure 2 omitting the stream of material;

Figure 4 is a plan view of the spreader shown in Figure 1;

Figure 5 is a plan View of a modified form of spreader;

Figure 6 is a ve tical cross section taken, on line 66 of Figure 5; v

Figure 7 is a side elevation with parts broken away showing a further modification.

Like parts are designated by like characters throughout.

As shown in Figure 1 the spreading means is illustrated in connection with a screen. This screen is formed of a screen frame A which is carried at one end upon a support A and at the other upon a support B. The support B is fixed against lateral movement at its ends, and is provided with one or more bearings B in which is journaled a shaft B and upon which is mounted a pulley B The pulley is driven by means of a belt B from a motor B Mounted upon the shaft B is a second,

pulley or wheel C.- Adjustably mounted on a spoke of this wheel is a weight C .The weight C is provided so that the pulley will be slightly out of balance and is adjustable. By means of the rotation of the wheel C the member B is caused to vibrate laterally and thus a vertical component of vibration is set up and the screen A is vibrated vertically.

D is a spreader which may be mounted directly on the screen as shown here or it may be mounted independent of the screen. As shown in Figure 1 the spreader is pivotally connected to the screen A at D and is provided at D with a threaded connection by means of which it is supported upon a shaft D This shaft is carried at its bottom in a bearing D and has upon it a hand wheel D by means of which it may be rotated so as to raise or lower the rear end of the spreader D. Y

- Situated preferably at the discharge end of the spreader D is a baffle or partition E. This partition as shown is curved in outline and this curve takes the form of a section of material which has been deposited upon the spreader. Thus if material is deposited upon the spreader as indicated particularly in Figure 4, it will move out and down across the spreader in the form of a delta. The bafile E is shaped to correspond to the shape which will be assumed by this delta so that the material will flow over the edge of the baffle in an even thickness across its entire width. This is shown particularly in Figures 2 and 3. In Figure 2 the section of material at the discharge end is shown to correspond with the form of the baflle shown in Figure 3. v

In Figure 5 is shown a modified form, of spreader. In this form the spreader is made up of a chute F which is provided with a'curved baflle F This bafiie F is of constant height but is curved away from the discharge end of the spreader at its center. This curvature is such that as material moves down the spreader and moves laterally across the spreader seeking its angle of repose, it will spread out and come in contact with the baffie so as to flow over itat an even depth across its entire front.

Thus the material is spread in practically the same manner as is the case with the battle shown in the preceding figures.

In Figure 7 I show a modified mount ng of the baffle plate. In this form I use a battle plate G which is carried on a pivotall y mounted shaft G Extending from one end of the shaft G is a controlling handle H. H is a plate adjacent the handle H. It is provided in its outer surface with a plurality of raised points H These points are adapted to ext-end into theperforations H or" the handle H. Thus the angle of incli nation of the battle plate G may be varied and it may he looked in this varied position by means of the cooperation of the han 'lle H and the points H engaging the perforations H I claim:

1 A spreader including in combination a chute adapted to receive material and a baffle plate across said chute, the outline of the plate at the point of contact with the stream of material being at all points throughout its length substantially the same as that of a section drawn through the stream of material where it cngagesthe plate, whereby the material is caused to flow over the plate in a stream of uniform depth throughout its width.

2. A spreader including in combination a chute adapted to receive material and a battle plate across said chute, the outline of the plate at the point of con-tact with the stream of material being at all points throughout its length substantially the same as that of a section drawn through the stream of material where it engages the plate, whereby the material is caused to flow over the plate in a stream of uniform depth through its width, said chute being inclined and means for varying its degree of inclination.

A spreader including in combination a chute adapted to receive material and a baffle plate across said chute, the outline of the plate at the point of contact with the stream of material being at all points throughout its length substantially the same as that of a section drawn through the stream of material where it engages the plate, whereby the material is caused to flow over the plate in a stream of uniform depth throughout its width, and means for agitating said chute.

4. A spreader including in combination a chute adapted to receive material and a battle plate across said chute, the outline of the plate at the point of contact with the stream of material being at all points throughout its length substantially the same as that of a section drawn through the stream of material where it engages the plate, whereby the material is caused to flow over the plate in a stream of uniform depth through its Width, said chute being inclined and means for varying its degree of inclination, and means for agitating said chute.

5. A spreaderincluding in combination a chute adapted to receive material and a battle plate across said chute so shaped that as the material flows upon the chute it will. flow over the battle in a sheet of uniform thickness throughout its width.

6. A spreader including in combination a chute adapted to receive material and a batile plate across said chute so shaped that as the material. flows upon the chute it will flow over the battle in a sheet of i'inii'orm thickness throughout its width, said chute being inclined and means for varying its angle of inclination.

7. A spreader including in combination a chute adapted to receive material and a bafiie plate across said chute so shaped that as the material flows upon the chute it will flow over the battle in a sheet of uniform thickness throughout its width, and means for agitating said chute,

8. A spreader including in combination a chute adapted to receive material a baffle plate across said chute so shaped that as the material flows upon the chute it will flow over the battle in a sheet of uniform thickness throughout its width, said chute being inclined, means for varying its angle of inclination and means for agitating said chute. T

9. A spreader including a chute adapted to receive material, in combination with a baffle plate extending across said chute, the outline of the plate being that of a section drawn through the pile of material in the form which it naturally :takes when free.

10. A spreader including a chute adapted to receive material, in combination with a baflie plate extending across said chute, the outline of the plate being that of a section drawn through the pile ofmaterial in :the form which it naturally takes when free, said chute being inclined and means for varying its angle of inclination. v

. 11. A spreader includingachute adapted to receive material, in combination with a battle plate extending across said chute, the outline of the plate being that of a section drawn through the pile of material in the form which it naturally takes when free, and means for agitatingsaid chute.

12. A spreader including a chute adapted to receive material, in combination with .a baflle plate extending across said chute, the outline of the plate being that of a section drawn through the pile of material in the form which it naturally takes when free, said chute being inclined, means for varying its angle of inclination, and means for agitating said chute.

13. A spreader including in combination a chute adapted to receive material and a baffle plate across said chute, the outline of the plate at the point of contact with the stream of material being at all points throughout its length substantially the same as that of a section through the stream of material where it engages the plate, whereby the material is caused to flow over the plate in a stream of uniform depth throughout its width, said bafiie plate being mounted for movement so that its angle of inclination with relation to the surface of the chute may be varied.

14. A spreader including in combination a chute adapted to receive material and a bafiie plate across said chute, the outline of the plate at the point of contact with the stream of material being at all points throughout its length substantially the same as that of a section through the stream of material where it engages the plate, whereby the material is caused to flow over the plate in a stream of uniform depth through its width, said chute being inclined and means for varying its degree of inclination,

, said baffle plate being mounted for movement so that its angle of inclination with relation to the surface of the chute may be varied. 1

15. A spreader including in combination a chute adapted to receive material and a baffle plate across said chute, the outline of the plate at the point of contact with the stream of material being at all points throughout its length substantially the same as thatof a section through the stream of material where it engages the plate, whereby the material is caused to flow over the plate in a stream of uniform depth throughout its width, and'means for agitating said chute, said bafile plate being mounted for movement so that its angle of inclination with relation to the surface of the chute may be varied.

16; A spreader including in combination a chute adapted to receive material and a bafile plate across said chute, the outline of the plate at the point of contact with the stream of material being at all points throughout its length substantially the same as that of a section through the stream of material where it engages the plate, whereby the material is caused to flow over the plate in a stream of uniform depth through its width, said chute being inclined and means for varying its degree of inclination, and means for agitating said chute, said bafile'plate mounted for movement so that its angle of inclination with relation to the surface of the chute may be varied.

Signed at Chicago, county of Cook, and State of Illinois, this 14th day of May, 1924.

JOHN BLAND. 

